This is a very minor thing, but something I just passed by and thought it could use some attention.
In the Hermelinen Bunker, not far from the War Board is a stairwell with two red doors. Neither of them are usable, as in not even locked but static.
Since we learn that red doors are openable early in the game I thought it best to perhaps replace these by regular walls so players don’t get confused. Or expand with a few more rooms.